Why you use joiplay when game have official android port?
Bogdan There are so many reasons I already stated:
-Games on external storage (reduce internal chip's cells wear)
-Save access, no need to root the device, for android <8.
meaning you can port them, sync them. mod them. back up them.
-support Joypad/Spen...
-console
-Support lot of games you don't have an apk for.
-you also understand that renpy works with python's scripts right?
while you can sandbox each apk. you can sandbox joiplay as a whole,
and prevent some "oddities" if there are some.
-You don't even need the renpy's folder contents and the libs,
meaning if you have multiples renpy games, you don't loose space for duplicate folders (.obb)
-Lastly, you can unrpa and compress the game folder, as well at install WT mods if you feel like it.
There are others: no save loss in case of manifest's change, can install more than one v. of the game, game can be more than 4Gio....